Screws were described as "2BA", "4BA" etc. 2BA threads are commonly found in the old imperial BESA conduit boxes. BA sizes were also used extensively in aircraft, especially those manufactured in the ...

Screws were described as "2BA", "4BA" etc. 2BA threads are commonly found in the old imperial BESA conduit boxes. BA sizes were also used extensively in aircraft, especially those manufactured in the ...

Screws were described as "2BA", "4BA" etc. 2BA threads are commonly found in the old imperial BESA conduit boxes. BA sizes were also used extensively in aircraft, especially those manufactured in the ...

Screws were described as "2BA", "4BA" etc. 2BA threads are commonly found in the old imperial BESA conduit boxes. BA sizes were also used extensively in aircraft, especially those manufactured in the ...

Screws were described as "2BA", "4BA" etc. 2BA threads are commonly found in the old imperial BESA conduit boxes. BA sizes were also used extensively in aircraft, especially those manufactured in the ...